480 divided by 7.5 = 64 cfm fan size. Or select the closest available fan size, when in between sizes, always select the higher CFM fan. Meaning, if there is a 50 CFM fan and a 75 CFM fan, select the 75 CFM fan.

" Relying on 12+ years of interior design experience and expertise, I create impeccable results for my valued and respected clients. I am delighted to provide you with beautiful interior design solutions that deliver peace of mind, through the highest level of professional integrity and service." ​Jil Sonia McDonald, Fraser Valley, BC